Software Engineer II

Commerce Software UK Ltd; Greater London; On-site; GBP 75,000 - 105,000; Full time

Job summary

Commerce is seeking a backend-oriented Software Engineer II to join our Data Experience squad. You will design and implement reliable backend services and APIs, work with data models and event-driven flows, and collaborate with cross-functional teams to deliver end-to-end product experiences.

You will contribute to production health with monitoring, observability, and robust tests, while maintaining a bias for simple, scalable solutions.

Qualifications

• 3+ years of back-end focused software engineering experience.
• Strong SQL and data modeling fundamentals.
• Experience building APIs, services, and integrations.
• Experience with distributed systems, event-driven flows, caching, retries, rate limits, and production failure modes.
• You can work across layers of a system, with backend as primary strength.
• You write automated tests and use logs, metrics, dashboards, and tracing to understand production behavior.

Responsibilities

• Design and build reliable backend services and APIs that power product workflows.
• Work with data models, SQL, and event-driven flows to support product and backend features.
• Collaborate across teams including product, design, and infrastructure to deliver end-to-end solutions.
• Contribute to production health through monitoring, logging, and runbooks.

Skills

Backend development

Java

Scala

Kotlin

Go

SQL

APIs

Education

Bachelor's degree in CS/EE/SW/CE/MIS or equivalent

Tools

SQL databases

Job description

Welcome to the Agentic Commerce Era At Commerce, our mission is to empower businesses to innovate, grow, and thrive with our open, AI-driven commerce ecosystem. As the parent company of BigCommerce, Feedonomics, and Makeswift, we connect the tools and systems that power growth, enabling businesses to unlock the full potential of their data, deliver seamless and personalized experiences across every channel, and adapt swiftly to an ever-changing market. We believe in harnessing AI responsibly to unlock new possibilities, and we're looking for individuals who use it intentionally to solve problems, accelerate outcomes, and expand what's possible in their role. Our purpose is to help businesses confidently solve complex commerce challenges so they can build smarter, adapt faster, and grow on their own terms. If you want to be part of a team of bold builders, sharp thinkers, and technical trailblazers who shape the future of commerce, this is the place for you. We are looking for a Software Engineer II, backend-oriented, to join our Data Experience squad. This role centers on backend services, APIs, working across data modeling, SQL, event and integration flows, and product-facing workflows. You're building backend and data-informed features that power product experience. You should be comfortable taking a reasonably scoped business or customer problem, breaking it down, surfacing trade-offs, and shipping a reliable solution, and know when to loop in a senior engineer or elevate as scope or risk grows. We're looking for someone who raises their own bar quickly and is building toward needing less direction over time.

What You'll Do

• Design and build reliable backend services and APIs that power product workflows.
• Work with data models, SQL, and event-driven flows to support product and backend features.
• Work with UI surfaces when needed to deliver end-to-end solutions, without owning frontend architecture.
• Break down well-scoped problems into concrete technical plans, partnering with senior engineers on more ambiguous ones.
• Contribute to production health (monitoring, alerting, logging, debugging, and runbooks) for the systems you build.
• Work with product, design, infrastructure, support, and other engineering teams.
• Improve quality through tests, code review, observability, and simpler designs.
• Use data and production evidence to validate decisions.
• Participate in incident response and troubleshooting when systems don't behave as expected, escalating and collaborating as needed.

Who You Are

• You have 3+ years of back-end focused software engineering experience, with solid backend skills in Java, Scala, Kotlin, Go, or a similar language Education: Preferred minimum Bachelor's degree in CS, EE, SW, CE, MIS; or equivalent experience.
• You have strong SQL and data modeling fundamentals, and you're comfortable using them to inform backend and product decisions.
• You have experience building APIs, services, and integrations, and are developing comfort with distributed systems, event-driven flows, caching, retries, rate limits, and the many ways production systems fail.
• You can work across layers of a system, including UI/front-end work when a problem calls for it, but your primary strength and focus is backend.
• You write automated tests, review code thoughtfully, and use logs, metrics, dashboards, and tracing to understand how your systems behave in production.
• You stay calm and clear during incidents, and you can explain your own trade-offs to both engineers and non-engineers.
• You have a bias toward simple, reliable solutions and write code that other engineers can follow and maintain.
• You take ownership of your outcomes, not just tickets. You ask what problem you're solving before jumping to implementation, validate risky assumptions early, and escalat
• You don't take shortcuts around process, security, or production safety

Nice to have

• React/TypeScript or similar frontend experience, merchant- or customer-facing product work, third-party integrations (OAuth, account linking, external APIs), Redis/caching/queues at scale, or experience with analytics and event data products

Identity Verification

To protect our candidates and company from fraudulent activity, our interview process may include a government ID and biometric verification via Persona, our trusted identity verification provider. All information is collected and processed securely in accordance with applicable privacy laws.

Inclusion and Belonging

At Commerce, we believe that celebrating the unique histories, perspectives and abilities of every employee makes a difference for our company, our customers and our community. We are an equal opportunity employer and the inclusive atmosphere we build together will make room for every person to contribute, grow and thrive. We will ensure that individuals with disabilities are provided reasonable accommodation to participate in the interview process, to perform essential job functions and to receive other benefits and privileges of employment. If you need an accommodation in order to interview at Commerce, please let us know during any of your interactions with our recruiting team.

Learn more about the Commerce team, culture and benefits at https://www.commerce.com/careers/

The Commerce story is one of global growth, incredible talent, and unstoppable passion in all we do. Despite our huge success so far, we're still just getting started! Explore our history, mission and values. You'll see we're set on shaping the now - and the future - of ecommerce. Don't Miss Out! Like what you see but suffering from some serious FOMO? Join our Commerce Talent Community, and plug in to our latest news and career opportunities. We're a group of clever, committed, curious people, unleashing talent in all we do. We believe in the power of togetherness, striving at the edge of what’s possible, impacting the lives of billions of people for the better. In all we do, We Do Extraordinary-and that’s no small feat! Our people are our power. It's only through dedication, collaboration, and inspiration that we can Do Extraordinary. We're natural problem-solvers, champions of empowering businesses, and hungry learners… but we also play nerf wars in the office, support each other, and hang out outside of work.